# Relationship history for MSHA mine 4800287

Current hierarchy: **Bryan  Barthelmess → Mc Garvin-Moberly Construction Company → CRUSHER NO 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Mc Garvin-Moberly Construction Company → CRUSHER NO 1; 1950-01-01 to 1995-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Harry  Moberly et al → CRUSHER NO 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry  Moberly et al → Mc Garvin-Moberly Construction Company; 1950-01-01 to 1995-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Mc Garvin-Moberly Construction Company → CRUSHER NO 1; 1995-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philip  Caines et al → CRUSHER NO 1; 1995-02-27 to 2022-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Philip  Caines et al → Mc Garvin-Moberly Construction Company; 1995-02-27 to 2022-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Bryan  Barthelmess → CRUSHER NO 1; 2022-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Barthelmess → Mc Garvin-Moberly Construction Company; 2022-01-05 to current/open; source msha-controller-operator-history